FastDFS文件上传测试

FastDFS是一款开源的分布式存储框架，主要有三个部分组成，client, tracker和storage.具体的相关架构和介绍见相关博客。文件上传操作实现在FastDFS源代码中的client，名字叫做fdfs_upload_file.c

/**
* Copyright (C) 2008 Happy Fish / YuQing
*
* FastDFS may be copied only under the terms of the GNU General
* Public License V3, which may be found in the FastDFS source kit.
* Please visit the FastDFS Home Page http://www.csource.org/ for more detail.
**/

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include "fdfs_client.h"
#include "fastcommon/logger.h"

static void usage(char *argv[])
{
	printf("Usage: %s   " \
		"[storage_ip:port] [store_path_index]\n", argv[0]);
}

int main(int argc, char *argv[])
{
	char *conf_filename;//client配置文件
	char *local_filename;//需要上传的文件
	char group_name[FDFS_GROUP_NAME_MAX_LEN + 1];
	ConnectionInfo *pTrackerServer;//指向跟踪器
	int result;
	int store_path_index;
	ConnectionInfo storageServer;
	char file_id[128];
	
	if (argc < 3)
	{
		usage(argv);
		return 1;
	}

	log_init();
	g_log_context.log_level = LOG_ERR;
	ignore_signal_pipe();

	conf_filename = argv[1];
	//客户端配置
	if ((result=fdfs_client_init(conf_filename)) != 0)
	{
		return result;
	}
//通过配置文件中读到的数据，连接追踪服务器
	pTrackerServer = tracker_get_connection();
	if (pTrackerServer == NULL)
	{
		fdfs_client_destroy();
		return errno != 0 ? errno : ECONNREFUSED;
	}

	local_filename = argv[2];
	*group_name = '\0';
	if (argc >= 4)
	{
		const char *pPort;
		const char *pIpAndPort;

		pIpAndPort = argv[3];
		pPort = strchr(pIpAndPort, ':');
		if (pPort == NULL)
		{
			fdfs_client_destroy();
			fprintf(stderr, "invalid storage ip address and " \
				"port: %s\n", pIpAndPort);
			usage(argv);
			return 1;
		}

		storageServer.sock = -1;
		snprintf(storageServer.ip_addr, sizeof(storageServer.ip_addr), \
			 "%.*s", (int)(pPort - pIpAndPort), pIpAndPort);
		storageServer.port = atoi(pPort + 1);
		if (argc >= 5)
		{
			store_path_index = atoi(argv[4]);
		}
		else
		{
			store_path_index = -1;
		}
	}
	//通过追踪器得到存储节点信息
	else if ((result=tracker_query_storage_store(pTrackerServer, \
	                &storageServer, group_name, &store_path_index)) != 0)
	{
		fdfs_client_destroy();
		fprintf(stderr, "tracker_query_storage fail, " \
			"error no: %d, error info: %s\n", \
			result, STRERROR(result));
		return result;
	}
//上传操作
	result = storage_upload_by_filename1(pTrackerServer, \
			&storageServer, store_path_index, \
			local_filename, NULL, \
			NULL, 0, group_name, file_id);
	if (result == 0)
	{
		printf("%s\n", file_id);
	}
	else
	{
		fprintf(stderr, "upload file fail, " \
			"error no: %d, error info: %s\n", \
			result, STRERROR(result));
	}

	tracker_disconnect_server_ex(pTrackerServer, true);
	fdfs_client_destroy();

	return result;
}

上面是源代码，下面主要利用源代码来实现一个我们自己的文件上传小Demo示例.
fdfs_upload_file.c实现

//filename  客户端配置文件
//myfile 需要上传的文件
int fdfs_upload_file(const char* filename, const char* myfile, char* file_id)
{
	char group_name[FDFS_GROUP_NAME_MAX_LEN + 1];
	ConnectionInfo *pTrackerServer;
	int result;
	int store_path_index;
	ConnectionInfo storageServer;
	if ((result=fdfs_client_init(filename)) != 0)
	{
		return result;
	}
	pTrackerServer = tracker_get_connection();
	if (pTrackerServer == NULL)
	{
		fdfs_client_destroy();
		return errno != 0 ? errno : ECONNREFUSED;
	}
	*group_name = '\0';
	if ((result=tracker_query_storage_store(pTrackerServer, \
	                &storageServer, group_name, &store_path_index)) != 0)
	{
		fdfs_client_destroy();
		fprintf(stderr, "tracker_query_storage fail, " \
			"error no: %d, error info: %s\n", \
			result, STRERROR(result));
		return result;
	}
	result = storage_upload_by_filename1(pTrackerServer, \
			&storageServer, store_path_index, \
			myfile, NULL, \
			NULL, 0, group_name, file_id);
	if (result == 0)
	{
		printf("%s\n", file_id);
	}
	else
	{
		fprintf(stderr, "upload file fail, " \
			"error no: %d, error info: %s\n", \
			result, STRERROR(result));
	}

	tracker_disconnect_server_ex(pTrackerServer, true);
	fdfs_client_destroy();

	return result;
}

相关的头文件fdfs_api.h

#ifndef _FDFS_API_H//防卫式声明，避免重复包含
#define _FDFS_API_H
int fdfs_upload_file(const char* conf_file, const char* myfile, char* file_id);
#endif

主文件main.c

#include
#include
#include
#include"fdfs_api.h"
int main(int args , char* argv[]){
	char fileid[1024] = {0};
	fdfs_upload_file("/etc/fdfs/client.conf",argv[1],fileid);
	printf("fileid = %s\n",fileid);
	return 0;
}

接下来在命令行利用gcc编译得到可执行文件，在编译过程中，编译器会提示缺少相关的头文件和动态链接库。

gcc fdfs_api.c main.c -I /usr/include/fastdfs/ -I /usr/include/fastcommon/ -lfdfsclient -o main

这里生成的可执行文件是main，然后运行main

./main main.c

这里将main.c文件上传。最后得到输出信息。

group1/M00/00/00/wKizgFyM_5uALngQAAAA8yoERFY67844.c
fileid = group1/M00/00/00/wKizgFyM_5uALngQAAAA8yoERFY67844.c

这里的group1是配置文件中设置的，M00是地址映射，也就是自己在配置文件中所设置的存储路径。
路漫漫其修远兮，吾将上下而求索。自己给自己打气。